I used an assortment of moves including XY-Wings, W-Wing and ER before finishing off with a Type 2 UR on 24. However, I think the UR was there all along so some of my previous moves were probably not necessary.

The w-wing57 is in r1c6 & r3c1(marked with a W) and the "grouped link on <7>" is in box3. A <7> will be placed in either r1 or r3 within box3 thereby forcing one of the w-wing pincers to be a <5>, which deletes <5> from r1c3 to complete the puzzle.

Your elimination certainly is correct. The W-wing logic is, in this case, <7> in either W-cell forces <5> in the other. I think "grouped link" is an adequately descriptive name. (I would know what to look for.)